Compounds of the formula (I) ##STR1## wherein D represents a 5-membered heterocyclic aromatic ring containing 1 to 4 heteroatoms selected from O, N or S, optionally substituted at a carbon atom by halogen, trifluoromethyl, alkyl C1 to 6, nitro, cyano, and which is connected to the remainder of the compound of formula (I) through a carbon atom; A represents (N(X) or CH(--(CH.sub.2).sub.m --NXY); U represents NH, O or CH.sub.2 ; V represents (CH.sub.2).sub.b ; a, b,m, X and Y are as defined in the specification, together with processes for their preparation and compositions containing them. Compounds of formula (I) are nitric oxide synthetase inhibitors and are useful in therapy.
公式(I)的化合物 ##STR1## 其中D代表含有1至4个O、N或S杂原子的5元杂环芳香环,可在碳原子上被卤素、三
氟甲基、烷基C1至6、硝基、
氰基取代,并通过碳原子连接到公式(I)化合物的其余部分;A代表(N(X)或CH(--(CH.sub.2).sub.m--NXY);U代表NH,O或CH.sub.2;V代表(CH.sub.2).sub.b;a、b、m、X和Y在说明书中定义,以及其制备方法和含有它们的组合物。公式(I)的化合物是
一氧化氮合酶
抑制剂,可用于治疗。